There are two widespread but opposite beliefs surrounding security in the public cloud. When you send data to the cloud, you no longer control it and you dont actually own it. Both of these beliefs are broad and all embracing, telling you everything you need to know about cloud security. The cloud can offer real security advantages, due to the emphasis that providers can and do place on security protections. But in the end, what you get out of your security measures is usually proportional to the time and effort you put into them.”]
Source: https://securityintelligence.com/cloud-security-is-not-an-eitheror/